Senior Back End Developer Lisboa

Senior Back End Developer
Lisboa
Lisboa, Lisboa, Portugal

Senior Backend Engineer – Portugal (Full-Time)

Remote / Portugal | Time zone:

Portugal and Located in Portugal | ⏰ Full-time

At Luca, we’re building the next generation of learning tools for Latin America. We create AI-powered educational products that blend smart design, engaging content, and beautiful technology—used by thousands of students, parents, and schools across the region.

We’re looking for a Senior Backend Engineer with strong experience in Type
Script, Graph
QL, and modern
- native architecture. If you care about clean systems design, scalability, and want to push the boundaries of what’s possible with AI tools like Open
AI Agent SDK—this role is for you.

What You’ll Be Doing

You’ll work
- functionally with:

Frontend developers to deliver seamless API and data integrations

AI engineers to build autonomous agents and
- driven logic

Infrastructure teams to scale
- driven systems on GCP

Product leads to implement resilient and modular backend services

Dev
Ops and QA to maintain reliability and traceability across environments

Your Responsibilities

Backend & API Engineering

Build and maintain backend services in Node. Js + Type
Script, applying clean architecture and DDD where applicable

Design and optimize Graph
QL APIs, using advanced auth, reusable fragments, and decoupled resolvers

Integrate and manage Prisma ORM in
- concurrency,
- tenant environments

Data & Storage

Design and optimize complex Postgre
SQL schemas:

indexes, materialized views, partitions

Use Firebase Firestore for No
SQL with efficient modeling, access control, and indexing

Implement data backup, replication, and recovery strategies

Cloud Infrastructure (GCP)

Deploy services on Cloud Run and Cloud Functions with Docker

Design
- driven pipelines with Pub/Sub, retries, and
- letter topics

Configure routing, SSL certificates, domain management, and granular bucket policies

Implement secure communication using Secrets Manager, VPC connectors, and
-
- service authentication

AI Integration with Open
AI

Build
- based features using Open
AI Agent SDK

Design modular agent systems, advanced prompting strategies, and reasoning chains

Implement embeddings, context caching, and prompt validation pipelines

What We’re Looking For

5+ years of experience building modern backend systems

Based in Portugal

Expertise in:

Type
Script (advanced types, decorators, composition)

Node. Js (streams, clusters, profiling)

Graph
QL (federation, batching, error masking)

Prisma (middlewares, raw queries, performance tuning)

Postgre
SQL (execution plans, tuning, triggers)

Firestore and No
SQL modeling (indexes, TTL, batch consumption)

Pub/Sub and
- driven architectures

GCP (Cloud Run, Docker, routing, Secrets Manager)

Open
AI Agent SDK (agent composition, embeddings, prompting)

Experience in:

Asynchronous and decoupled system design

CI/CD pipelines with Git
Hub Actions, Cloud Build

Observability using Stackdriver / Cloud Logging

What We Offer

Full-time, 100% remote position based in Portugal within the Mexico/Argentina time zone

A
- moving
- led team, backed by top European VCs

The chance to build core systems that shape how millions of students learn

A culture of ownership, curiosity, and continuous learning

About Luca

Founded in Portugal, Luca is the
- growing edtech company in Mexico — and one of the top
- stage startups in Latin America.

We’re building the AI-native education company of the future:

combining great content, intuitive software, and the power of AI to reshape how students learn.

Already serving over 20, 000 students in under 18 months, we've earned recognition from global leaders in edtech:

GSV Cup – Top 3 Global Ed
Tech Startups

Holon
IQ – Top 100 Lat
Am Ed
Techs

If you want to build meaningful,
- impact technology with a
- class team — join us.